So I'm starting build a team. Right now will be focusing on Dragonite and Jolteon; the former will be a Expreme Speed Multiscale while I'm still determine what role I want to pull off with Jolteon.
Afterwards I want to have a tank on my team, but I never really utilized one before (as surprising as it sounds).
The best role Jolteon can do is a special sweeper. Unfortunately, Mega Manectric, Thundurus and even Raikou outclass Jolteon in the Electric specials sweeping role because they have better stats, move pools and/or utility roles.
Anyway, here are sets you should use for each, but take note that Jolteon is still outclassed:
Dragonite:
-Dragon Dance
-Outrage/Dragon Claw
-Earthquake/Fire Punch
-Extreme Speed
Nature: Adamant
EVs: 252 Atk/4 Def/252 Spe
Item: Lum Berry
Ability: Multiscale
or
-Outrage
-Earthquake/Superpower
-Extreme Speed
-Fire Punch/Dragon Claw
Nature: Adamant
EVs: 252 Atk/4 Def/252 Spe
Item: Choice Band
Ability: Multiscale
or
-Dragon Claw
-Earthquake/Fire Punch
-Extreme Speed
-Roost
Nature: Adamant
EVs: 216 HP/64 Atk/228 SDef
Item: Leftovers
Ability: Multiscale
Jolteon:
-Thunderbolt
-Volt Switch
-Hidden Power (Ice/Grass)
-Shadow Ball/Signal Beam
Nature: Timid
EVs: 4 Def/252 SAtk/252 Spe
Item: Life Orb/Choice Specs
Ability: Volt Absorb
As for a tank Pokemon, Ferrothorn, Mega Sableye, Mega Altaria, Therian Landorus, Skarmory, (Mega) Slowbro, Mandibuzz, Clefable, Heatran, Wash Rotom, Sylveon and even Empoleon and Super Size Gourgeist are examples:
Ferrothorn:
-Stealth Rock/Spikes
-Leech Seed
-Gyro Ball/Thunder Wave
-Power Whip/Protect
Nature: Relaxed
EVs: 252 HP/88 Def/168 SDef
Item: Leftovers/Shed Shell
Ability: Iron Barbs
Sableye:
-Calm Mind
-Dark Pulse/Shadow Ball
-Will-o-Wisp
-Recover
Nature: Bold
EVs: 252 HP/252 Def/4 SDef
Item: Sablenite
Ability: Prankster
Mega Altaria:
-Return/Hyper Voice
-Earthquake/Flamethrower/Perish Song/Roar
-Heal Bell
-Roost
Nature: Impish/Bold
EVs: 248 HP/104 Def/156 SDef
Item: Altarianite
Ability: Natural Cure
Therian Landorus:
-Stealth Rock
-Earthquake
-U-turn
-Stone Edge/Rock Slide/Knock Off
Nature: Impish
EVs: 252 HP/252 Def/4 SDef
Item: Leftovers
Skarmory:
-Roost
-Defog
-Counter/Brave Bird
-Taunt/Whirlwind
Nature: Bold/Impish
EVs: 252 HP/252 Def/4 SDef
Item: Shed Shell
Ability: Sturdy
or (cartridge-friendly)
-Spikes/Stealth Rock
-Whirlwind
-Roost
-Brave Bird/Taunt
Nature: Impish/Bold
EVs: 252 HP/252 Def/4 SDef
Item: Leftovers/Shed Shell
Ability: Sturdy
Slowbro:
-Calm Mind
-Scald
-Psyshock
-Slack Off
Nature: Bold
EVs: 252 HP/80 Def/176 SDef
Item: Slowbronite
Ability: Regenerator
or
-Scald
-Psyshock/Fire Blast/Ice Beam/Foul Play
-Thunder Wave/Toxic
-Slack Off
Nature: Bold
EVs: 252 HP/232 Def/24 SDef
Item: Leftovers/Slowbronite
Ability: Regenerator
or
-Calm Mind
-Iron Defense
-Scald
-Slack Off
Nature: Bold
EVs: 252 HP/80 Def/176 SDef
Item: Slowbronite
Ability: Regenerator
Mandibuzz:
-Foul Play
-Roost
-Taunt/Whirlwind
-Defog/Toxic/Knock Off
Nature: Bold/Impish
EVs: 248 HP/136 Def/108 SDef/16 Spe
Item: Leftovers
Ability: Overcoat
Clefable:
-Calm Mind
-Moonblast
-Flamethrower/Thunder Wave
-Soft-Boiled/Moonlight
Nature: Calm
EVs: 252 HP/172 Def/84 SDef
Item: Leftovers
Ability: Magic Guard
or
-Calm Mind
-Moonblast
-FlamethrowerHeal Bell/Aromatherapy/Protect
-Moonlight/Wish
Nature: Bold
EVs: 248 HP/252 Def/8 SDef
Item: Leftovers
Ability: Unaware
or
-Stealth Rock
-Moonblast
-Flamethrower/Fire BlastHeal Bell/Thunder Wave
-Moonlight
Nature: Calm
EVs: 252 HP/172 Def/84 SDef
Item: Leftovers
Ability: Unaware
Heatran:
-Lava Plume
-Taunt
-Toxic
-Stealth Rock
Nature: Timid
EVs: 248 HP/8 SAtk/252 Spe
Item: Leftovers
or
-Lava Plume
-Toxic
-Taunt/Roar
-Stealth Rock/Protect/Earth Power
Nature: Calm
EVs: 248 HP/192 SDef/68 Spe
Item: Leftovers
Wash Rotom:
-Volt Switch
-Hydro Pump
-Will-o-Wisp
-Pain Split
Nature: Bold/Calm
EVs: 248 HP/216 Def/44 Spe (Bold) or 248 HP/216 SDef/44 Spe (Calm)
Item: Leftovers
Sylveon:
-Wish
-Protect
-Hyper Voice
-Heal Bell/Toxic
Nature: Bold
EVs: 252 HP/220 Def/36 SDef
Item: Leftovers
Ability: Pixilate
Empoleon:
-Defog/Stealth Rock
-Toxic/Stealth Rock
-Scald
-Roar
Nature: Calm
EVs: 248 HP/8 Def/252 SDef
Item: Leftovers
Ability: Torrent
Gourgeist:
-Will-o-Wisp
-Leech Seed
-Synthesis
-Seed Bomb
Nature: Impish
EVs: 252 HP/160 Def/96 SDef
Item: Leftovers
Ability: Frisk